Belt-pulley for power transmission



W. J. MANNING.

BELT PULLEY FOR POWER TRANSMISSION.

APPLICATION FILED MAR. 8, 1919A Patented Feb. 3, 1920.

UNITED STATES PATENT OFFICE.

WILLIAM JOSEPE MANNING, OF "WOLVEBHAMPTON, ENGLAND.

BELT -PULLEY FOB, PO'WER TRANSMISSION.

Application filed March 8, 1919.

To all whom it may concern:

Be it known that LVVILLIAM Josnrrr MAN- NING, a subject of the King ofEngland, residing at Green Lane Works, Dudley Road, WVolverhanipton,England, have invented certain new and useful Improvements inBelt-Pulleys for Power Transmission, of which the following is aspecification, refer ence being had to the accompanying drawings.

This invention comprises certain improve ments in or relating to beltpower transmission pulleys, particularly of small size such as of fiveto nine inches diameter; and it has for its object a metal pulley whichis cheap to manufacture and which is readily and efliciently assembledon the shafting.

According to the present invention While the metal pulley is built up insections, the sections are not held together by being gripped upon theshafting, but the pulley when assembled forms a self supportingstructure, means being incorporated for gripping the pulley on theshafting.

In order that the invention may be clearly understood and readilycarried into effect reference may be had to the accompanying drawings onWhich Figure 1 is an end view of the pulley constructed according tothis invention.

Fig. 2 is a face view.

Fig. 3 is a section, on line 00 a: of Fig. l, of one half of the pulley.

Fig. 4L is a face View of the pulley half shown by Fig. 3, and

Figs. 5 and 6 are end views of the two pulley sections in the positionfor being slid together to constitute a pulley.

According to a convenient embodiment of the present invention the pulleypreferably comprises two similar sections, a. and 6, each sectioncomprising a complete circumferential rim with the exception of a slot 0therein which will allow the shafting to pass therethrough. Eachsection, diametrically opposite the said slot, has a portion of the rim(Z projecting therefrom, thus when the two portions are assembled theprojection (Z on the one enters the slot 0 in the other and forms thecomplete pulley rim.

Each of the sections, which are preferably formed of similar castings,comprise the rim 6, web f, and one half 9 of the boss.

Specification ofLetters ?atent.

Patented Feb. 3, 1920.

Serial No. 281,431.

The web has a slot 0 therein forming a continuous slot with the slot inthe rim, while the web has a thickened projecting part (Z which with thesaid projecting part of the rim forms a wedge piece for fitting into thesaid slot of the other section. The width of the projecting partaforesaid is conveniently equal to the diameter of the boss where itjoins with the half boss, but tapers toward the rim and therefore as theslot is correspondingly shaped the pulley can only be disassembled by arelative axial movement on the snafting.

To fasten the two sections together bolts 71. are passed through thewebs of the sections. If desired a boss M can be cast on the web wherethe bolt passes therethrough, which boss is adapted, when the pulley sections are together, to fit into a hole in the other web, thus relievingthe strain 011 the bolts.

Any desired means may be adapted for fastening the pulley to theshafting. Ac cording to one form thereof a screw threaded I hole isformed radially through the pulley section at the thickened projectingwedge part aforementioned, the outer end of the hole having an enlargedend for receiving the head of the screwed pin j and for permitting thespanner to be applied to the head. The lower end of the tapped hole atthe boss is also enlarged to receive therein a cylindrical member la.The face of this cylindrical member is serrated so as to provide asufliciently large and good gripping surface, the screw pin beingadapted to press such cylindrical member on the shafting to give thefrictional grip thereon. A fastening means as aforedescribed may beincorporated in connection with each section of the pulley.

According to a modified form of the invention, in lieu of the slots 0and projecting parts al being tapered the same may be stepped, theshoulders thus formed preventing the pulley sections being disassembledexcept by an endwise movement.

Claims:

1. A power transmission belt pulley, comprising two sections, eachsection comprising a rim, a slot in the rim for the passage of the shafttherethrough and a portion of rim laterally projecting and locateddiametrically opposite said slot, whereby the projecting portion of onerim enters the slot in the other rim to form a complete pulley rim, eachsection also comprising one half the pulley boss, means for fasteningthe pulley sections together, and means for securing the pulley to theshaft, substantially as set forth.

2. A power transmission belt pulley, comprising two similar sections,each section comprising a rim, a slot in the rim for the passage of theshaft therethrough, a lateral projection located diametrically oppositesaiu slot and forming a portion of the rim, whereby the projection ofone section enters the slot in the other for forming a complete pulleyrim, the projection and slot being shaped so as to permit ofdisassembling only by a movement axially of the shaft, each section alsocomprising one half the pulley boss, means for fastening the two pulleysections together, and means for fastening the pulley to the shafting,substantially as set forth.

3. A power transmission belt pulley, comprising two similar sections,each section comprising a rim, web and half boss, a slot in the rimandweb, and a projection which is adapted to engage in the slot in therim and web of the other section to form a complete pulley, the sides ofthe slot being inclined and the projection wedge shaped, means forfastening the webs of the pulley sections together, and means forfastening the pulley on the shafting, substantially as set forth.

In witness whereof I have signed this specification in the presence oftwo witnesses.

l VlLLlAl /l JOSEPH MANNING.

Witnesses J. E. S. RAND, Aonns MANNING.

